Oh, if SM wants to see Poser crashing, all they have to do is drop by for some beer.

I'll try your suggestions after it finishes rendering. I increased a bit the MSR for the ground. Its at 0.1. I know that at 0.2 it won't crash at all, and at 0.5 it will definitelly not crash, but I'm affraid that at 0.5, the texture will blur a bit and the ground won't have that look I want. At 0.05, it looks so good that I can see the bacteria crawling over the specks of dirt.